crypto: caam - Forbid 2-key 3DES in FIPS mode

This patch forbids the use of 2-key 3DES (K1 == K3) in FIPS mode.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Tested-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 53 insertions, 13 deletions

diff --git a/drivers/crypto/caam/caamalg_qi2.c b/drivers/crypto/caam/caamalg_qi2.c
index c2c1abc68f81..d19c97acf1aa 100644
--- a/drivers/crypto/caam/caamalg_qi2.c
+++ b/drivers/crypto/caam/caamalg_qi2.c
@@ -323,6 +323,39 @@ badkey:
 	return -EINVAL;
 }
 
+static int des3_aead_setkey(struct crypto_aead *aead, const u8 *key,
+			    unsigned int keylen)
+{
+	struct crypto_authenc_keys keys;
+	u32 flags;
+	int err;
+
+	err = crypto_authenc_extractkeys(&keys, key, keylen);
+	if (unlikely(err))
+		goto badkey;
+
+	err = -EINVAL;
+	if (keys.enckeylen != DES3_EDE_KEY_SIZE)
+		goto badkey;
+
+	flags = crypto_aead_get_flags(aead);
+	err = __des3_verify_key(&flags, keys.enckey);
+	if (unlikely(err)) {
+		crypto_aead_set_flags(aead, flags);
+		goto out;
+	}
+
+	err = aead_setkey(aead, key, keylen);
+
+out:
+	memzero_explicit(&keys, sizeof(keys));
+	return err;
+
+badkey:
+	crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	goto out;
+}
+
 static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
 					   bool encrypt)
 {
@@ -938,6 +971,13 @@ static int skcipher_setkey(struct crypto_skcipher *skcipher, const u8 *key,
 	return 0;
 }
 
+static int des3_skcipher_setkey(struct crypto_skcipher *skcipher,
+				const u8 *key, unsigned int keylen)
+{
+	return unlikely(des3_verify_key(skcipher, key)) ?:
+	       skcipher_setkey(skcipher, key, keylen);
+}
+
 static int xts_skcipher_setkey(struct crypto_skcipher *skcipher, const u8 *key,
 			       unsigned int keylen)
 {
@@ -1484,7 +1524,7 @@ static struct caam_skcipher_alg driver_algs[] = {
 				.cra_driver_name = "cbc-3des-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = skcipher_setkey,
+			.setkey = des3_skcipher_setkey,
 			.encrypt = skcipher_encrypt,
 			.decrypt = skcipher_decrypt,
 			.min_keysize = DES3_EDE_KEY_SIZE,
@@ -1916,7 +1956,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -1938,7 +1978,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -1961,7 +2001,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -1984,7 +2024,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2007,7 +2047,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2030,7 +2070,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2053,7 +2093,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2076,7 +2116,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2099,7 +2139,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2122,7 +2162,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2145,7 +2185,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,
@@ -2168,7 +2208,7 @@ static struct caam_aead_alg driver_aeads[] = {
 						   "cbc-des3_ede-caam-qi2",
 				.cra_blocksize = DES3_EDE_BLOCK_SIZE,
 			},
-			.setkey = aead_setkey,
+			.setkey = des3_aead_setkey,
 			.setauthsize = aead_setauthsize,
 			.encrypt = aead_encrypt,
 			.decrypt = aead_decrypt,